Hello Sir/Madam,
I was actually looking into building one. I coded some small projects using Bitcoin. I can get a demo ready in the next 3 days. If I get it done in 3 days and you agree on my work, then great, you create a milestone and release it and I will send you all the files or transfer you the server.
I will do my best to meet your expectations.
Regards,
HSFDev.